Temperature Dependence of Fluctuation Time Scales in Spin Glasses

Details Temperature Dependence of Fluctuation Time Scales in Spin Glasses Temperature Dependence of Fluctuation Time Scales in Spin Glasses

2009-10-10

arxiv.org/abs/0910.1924v1

Phys. Rev. B (81), 014424, 2010

Physics

Condensed Matter

Disordered Systems and Neural Networks

10 pages, 4 figures

Scientific paper

10.1103/PhysRevB.81.014424

Using a series of fast cooling protocols we have probed aging effects in the spin glass state as a function of temperature. Analyzing the logarithmic decay found at very long time scales within a simple phenomenological barrier model, leads to the extraction of the fluctuation time scale of the system at a particular temperature. This is the smallest dynamical time-scale, defining a lower-cut off in a hierarchical description of the dynamics. We find that this fluctuation time scale, which is approximately equal to atomic spin fluctuation time scales near the transition temperature, follows ageneralized Arrhenius law. We discuss the hypothesisthat, upon cooling to a measuring temperature within the spin glass state, there is a range of dynamically in-equivalent configurations in which the system can be trapped, and check within a numerical barrier model simulation, that this leads to sub-aging behavior in scaling aged TRM decay curves, as recently discussed theoretically, see arXiv:0902.3556 .

Affiliated with

Also associated with

No associations

Rating

Temperature Dependence of Fluctuation Time Scales in Spin Glasses does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Temperature Dependence of Fluctuation Time Scales in Spin Glasses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature Dependence of Fluctuation Time Scales in Spin Glasses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-620584